Manual Exception Throwing C# with Example

 	using System;

	namespace CSharpExceptionHandling
	{
		class MyClass
		{
			public static void PrintArg(string arg)
			{
				try
				{
					if (arg == null)
					{
						ArgumentNullException myEx = new ArgumentNullException("arg");
						throw myEx;
					}
					Console.WriteLine(arg);
				}
				catch (ArgumentNullException e)
				{
					Console.WriteLine("Message: {0}", e.Message);
				}
			}
		}

		class Program
		{
			static void Main()
			{
				string s = null;
				MyClass.PrintArg(s);
				MyClass.PrintArg("Hi there!");
			}
		}
	}